Thanks for the input on my original question about installing a Soundstream Picasso pn4 540D amp on my 09 Ultra with Kappa 6.5s and the Aquatic AV radio........so, I have a follow up question; While I obviously am not designing the perfect system, I want to be able to hear my music on the road. Should I go with a more powerful amp? Soundsteam PN4 1000D ? or is the 540D safe and enough?

Thanks again,
Jet